Feshbach resonances, weakly bound molecular states, and coupled-channel potentials for cesium at high magnetic fields

We explore the scattering properties of ultracold ground-state Cs atoms at magnetic fields between 450 G (45 mT) and 1000 G. We identify 17 previously unreported Feshbach resonances, including two very broad ones near 549 and 787 G. We measure the binding energies of several different dimer states by magnetic field modulation spectroscopy. We use least-squares fitting to these experimental results, together with previous measurements at lower field, to determine a six-parameter model of the long-range interaction potential, designated M2012. Coupled-channels calculations using M2012 provide an accurate mapping between the s-wave scattering length and the magnetic field over the entire range of fields considered. This mapping is crucial for experiments that rely on precise tuning of the scattering length, such as those on Efimov physics. ©2013 American Physical Society.

Feshbach resonances, weakly bound molecular states, and coupled-channel potentials for cesium at high magnetic fields / Berninger, M.; Zenesini, A.; Huang, B.; Harm, W.; Nagerl, H. -C.; Ferlaino, F.; Grimm, R.; Julienne, P. S.; Hutson, J. M.. - In: PHYSICAL REVIEW A. - ISSN 1050-2947. - 87:3(2013). [10.1103/PhysRevA.87.032517]

Titolo: Feshbach resonances, weakly bound molecular states, and coupled-channel potentials for cesium at high magnetic fields
Autori: Berninger, M.; Zenesini, A.; Huang, B.; Harm, W.; Nagerl, H. -C.; Ferlaino, F.; Grimm, R.; Julienne, P. S.; Hutson, J. M.
Autori Unitn: 
Zenesini, Alessandro
mostra contributor esterni 
Titolo del periodico: PHYSICAL REVIEW A
Anno di pubblicazione: 2013
Numero e parte del fascicolo: 3
Codice identificativo Scopus: 2-s2.0-84875435358
Codice identificativo WOS: WOS:000316660000012
Digital Object Identifier (DOI): http://dx.doi.org/10.1103/PhysRevA.87.032517
Handle: http://hdl.handle.net/11572/344261
Citazione: Feshbach resonances, weakly bound molecular states, and coupled-channel potentials for cesium at high magnetic fields / Berninger, M.; Zenesini, A.; Huang, B.; Harm, W.; Nagerl, H. -C.; Ferlaino, F.; Grimm, R.; Julienne, P. S.; Hutson, J. M.. - In: PHYSICAL REVIEW A. - ISSN 1050-2947. - 87:3(2013). [10.1103/PhysRevA.87.032517]
Appare nelle tipologie:03.1 Articolo su rivista (Journal article)

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